NF EN ISO 11402

NF EN ISO 11402

August 2005
Standard Current

Phenolic, amino and condensation resins - Determination of free-formaldehyde content

ISO 11402:2004 specifies three methods for determining the free-formaldehyde content in the following:Phenolic resins, by potentiometric titration in aqueous or organic solution (hydroxylamine hydrochloride procedure). The method is applicable to resins with free-formaldehyde contents up to and including 15 % by mass. For free-formaldehyde contents between 15 % by mass and 30 % by mass, it may be necessary to adjust the concentrations of the standard volumetric solutions used accordingly.Amino resins and furan resins (sulfite procedure). The method is applicable to resins resulting from the polycondensation of urea and melamine with formaldehyde and to furan resins resulting from the polycondensation of furfuryl alcohol with formaldehyde without further modification.Condensation resins (KCN procedure), including urea resins, furan resins, melamine resins and phenolic resins, as well as combinations and modifications of these resins.The purpose of this International Standard is to establish recognized and useful determination procedures (for instance in order to check whether official regulations on the handling of hazardous workplace materials are observed).The free-formaldehyde content determined in formaldehyde condensation resins using this International Standard represents the actual content at the time of the determination. The value bears no quantitative relationship to the free-formaldehyde content during or after processing.

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Main informations

Collections

National standards and national normative documents

Publication date

August 2005

Number of pages

18 p.

Reference

NF EN ISO 11402

ICS Codes

83.080.10   Thermosetting materials

Classification index

T51-405

Print number

2 - 01/07/2006

International kinship

ISO 11402:2004

European kinship

EN ISO 11402:2005
Sumary
Phenolic, amino and condensation resins - Determination of free-formaldehyde content

ISO 11402:2004 specifies three methods for determining the free-formaldehyde content in the following:

  1. Phenolic resins, by potentiometric titration in aqueous or organic solution (hydroxylamine hydrochloride procedure). The method is applicable to resins with free-formaldehyde contents up to and including 15 % by mass. For free-formaldehyde contents between 15 % by mass and 30 % by mass, it may be necessary to adjust the concentrations of the standard volumetric solutions used accordingly.
  2. Amino resins and furan resins (sulfite procedure). The method is applicable to resins resulting from the polycondensation of urea and melamine with formaldehyde and to furan resins resulting from the polycondensation of furfuryl alcohol with formaldehyde without further modification.
  3. Condensation resins (KCN procedure), including urea resins, furan resins, melamine resins and phenolic resins, as well as combinations and modifications of these resins.

The purpose of this International Standard is to establish recognized and useful determination procedures (for instance in order to check whether official regulations on the handling of hazardous workplace materials are observed).

The free-formaldehyde content determined in formaldehyde condensation resins using this International Standard represents the actual content at the time of the determination. The value bears no quantitative relationship to the free-formaldehyde content during or after processing.

Replaced standards (3)
NF EN ISO 11402
October 1998
Standard Cancelled
Plastics. Condensation resins. Determination of free formaldehyde.

NF EN ISO 9397
April 1997
Standard Cancelled
Plastics. Phenolic resins. Determination of free-formaldehyde content. Hydroxylamine hydrochloride method.

NF EN ISO 9020
July 1998
Standard Cancelled
Binders for paints and varnishes. Determination of free-formaldehyde content of amino resins. Sodium sulfite titrimetric method.

Table of contents
  • Avant-propos
    iv
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes et définitions
    2
  • 4 Modes opératoires
    2
  • 5 Rapport d'essai
    10
  • Annexe A (informative) Adéquation des modes opératoires à divers types de résine
    11
  • Annexe B (informative) Élimination des ions Hg2+ et CN- des résidus de mercure et de cyanure
    12
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